Vibrating screen for thermoplastic elastomer production

Abstract

The utility model relates to a vibrating screen for thermoplastic elastomer production. The vibrating screen comprises a base and a screen barrel elastically connected with the base, a vibrator and a screen mesh are arranged in the screen barrel, an inner cavity of the screen barrel is divided into a plurality of screening cavities by the screen mesh, a discharging port and a feeding port are formed in the screen barrel, an annular installation base fixed relative to the screen barrel is arranged at the bottom or the peripheral area of the screen barrel, and an annular permanent magnet set is fixed to the annular installation base. The annular permanent magnet group is composed of a plurality of permanent magnet monomers, and magnetic poles of the permanent magnet monomers are obliquely arranged at the upper end close to the inner side in the axial direction; the base is provided with a horizontal annular electromagnet set coaxial with the annular permanent magnet set, the annular electromagnet set is composed of a plurality of electromagnetic single bodies, and the magnetic pole axial direction of the electromagnetic single bodies is coaxial with the magnetic pole axial direction of the permanent magnet single bodies. As the screen barrel is not in direct contact with the base, vibration noise of the connecting part of the screen barrel and the base and metal fatigue caused by vibration can be greatly reduced, and stable and reliable connection is ensured.

Description

Technical Field

[0001] The utility model relates to a vibrating screen, in particular to a vibrating screen for producing thermoplastic elastomers. Background Art

[0002] Thermoplastic elastomer TPE / TPR, also known as artificial rubber or synthetic rubber. Its products have the excellent properties of high elasticity, aging resistance and oil resistance of traditional cross-linked vulcanized rubber, and at the same time have the characteristics of convenient processing and wide processing methods of ordinary plastics. It can be produced by injection molding, extrusion, blow molding and other processing methods, and 100% of the edges and corners of the water outlet can be directly reused after being crushed. It simplifies the processing process and reduces the processing cost. Therefore, thermoplastic elastomer TPE / TPR material has become the latest material to replace traditional rubber. It is environmentally friendly, non-toxic, comfortable to the touch and beautiful in appearance.

[0003] Before melting, thermoplastic elastomers need to go through a crushing process to transform them into a particle state. The smaller the particles, the better the hot melt effect, otherwise it will affect the hot melt effect. Therefore, before the hot melt process, screening equipment will be used to sort the thermoplastic elastomer particles. Currently, the commonly used screening equipment is a vibrating screen, which has the characteristics of simple structure and high screening efficiency. However, since it uses high-frequency vibration generated by the high-speed centrifugal motion of the motor to promote the screening process, the equipment will not only generate noise when it is running, but also cause the equipment to be unable to be fixed in place due to vibration. Therefore, the base of the vibrating screen generally needs to be anchored to the ground. At the same time, in order to prevent the base from loosening due to vibration, a spring will be connected between the base and the vibrating body to reduce the vibration intensity of the base through the buffering effect of the spring. However, the connection part of the spring is still prone to metal fatigue, which can cause the spring to fall off. Summary of the invention

[0004] The utility model provides a vibrating screen for producing thermoplastic elastomers, which solves the problems existing in the prior art.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: a vibrating screen for thermoplastic elastomer production, comprising a base, a screen barrel elastically connected to the base, a vibrator and a screen mesh arranged in the screen barrel, the screen mesh dividing the inner cavity of the screen barrel into a plurality of screening cavities, the screen barrel is provided with a plurality of discharge ports connected to the screening cavities one-to-one, and a feed port is arranged on the top of the screen barrel, characterized in that: an annular mounting seat fixed relative to the bottom or peripheral area of ​​the screen barrel is provided, an annular permanent magnet group is fixed on the annular mounting seat, the annular permanent magnet group is composed of a plurality of permanent magnet monomers distributed in a circumferential array, and the magnetic pole axial direction of the permanent magnet monomer is inclined to the inner side of the upper end; a horizontal annular electromagnet group coaxial with the annular permanent magnet group is provided on the base, the annular electromagnet group is composed of a plurality of electromagnetic monomers distributed in a circumferential array and corresponding to the permanent magnet monomers one-to-one, and the magnetic pole axial direction of the electromagnetic monomer is coaxial with the magnetic pole axial direction of the permanent magnet monomer.

[0006] The electromagnetic monomer in the utility model can change the magnetic pole by changing the direction of the current. When a single electromagnetic monomer repels the corresponding permanent magnetic monomer with the same pole, the direction of the repulsive force on the permanent magnetic monomer is coaxial with its axis. Therefore, the repulsive force on the permanent magnetic monomer can be divided into a first component force pointing vertically upward and a second component force pointing to the center of the utility model. All permanent magnetic monomers produce the above two components. The resultant force of the first component force is also vertically upward, and the effect produced is to support the entire screen barrel, while the resultant force of the second component force cancels each other out, and the effect produced is to elastically position the screen barrel in the center area. In summary, since there is no direct contact between the screen barrel and the base, the vibration noise and metal fatigue caused by vibration at the connection between the two can be greatly reduced, ensuring a stable and reliable connection. At the same time, the impact on the base becomes less direct than before. Although the base still needs to be fixedly connected to the ground, it is less likely to loosen, and the ground is not easily damaged by vibration.

[0007] Furthermore, since the repulsive force between the annular electromagnet group and the annular permanent magnet group only has the two effects of supporting and centering the sieve barrel, it is unable to constrain the sieve barrel in the circumferential direction. Therefore, in order to prevent the sieve barrel from producing a circumferential rotation effect, the utility model also needs to install a circumferential constraint device.

[0008] Solution 1: The electromagnetic monomer is divided into a positioning electromagnetic monomer and a supporting electromagnetic monomer. The positioning electromagnetic monomer is evenly distributed in the electromagnetic monomer. The upper magnetic pole of the positioning electromagnetic monomer is opposite to the lower magnetic pole of the corresponding permanent magnetic monomer, and the upper magnetic pole of the supporting electromagnetic monomer is the same as the lower magnetic pole of the corresponding permanent magnetic monomer. The positioning electromagnetic monomer constrains the sieve barrel through suction to prevent the sieve barrel from rotating. The suction force generated by the positioning electromagnetic monomer is much smaller than the repulsion generated by the supporting electromagnetic monomer.

[0009] Solution 2: The upper magnetic pole of the electromagnetic monomer has the same magnetic property as the lower magnetic pole of the corresponding permanent magnetic monomer; a vertically arranged plug-in seat is provided on the base, and a downwardly arranged plug-in body is provided at the bottom of the screen barrel, and the plug-in body and the plug-in seat are plugged in up and down and cannot rotate relative to each other. In order to prevent the vibrating plug-in body from colliding with the plug-in seat and causing the vibration to be directly transmitted to the base, generally, at least one of the plug-in body and the plug-in seat is made of rubber.

[0010] Furthermore, the base is provided with a plurality of limit hooks, which can limit the height of the screen barrel within a fixed range. If there is no limit hook, once the screen barrel is subjected to an upward external force, the screen barrel is easily separated from the base and tipped over, which may cause damage to the equipment, so it is necessary to install a limit hook to limit the screen barrel.

[0011] Therefore, compared with the prior art, the utility model has the following characteristics: 1. Since there is no direct contact between the screen barrel and the base, the vibration noise and metal fatigue caused by vibration at the connection between the two can be greatly reduced, ensuring a stable and reliable connection. At the same time, the impact on the base becomes less direct than before. Although the base still needs to be fixedly connected to the ground, it is less likely to loosen and the ground is not easily damaged by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 is a structural schematic diagram of Example 1;

[0013] Attached Figure 2 1 is a schematic diagram of the structure of an annular permanent magnet group and an annular electromagnet group;

[0014] Attached Figure 3 is a schematic structural diagram of the annular permanent magnet group and the annular electromagnet group in Example 1;

[0015] Attached Figure 4 It is a structural schematic diagram of Example 2. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] Example 1: See Figure 1 and Figure 2 A vibrating screen for thermoplastic elastomer production includes a base 100, a screen barrel 200 elastically connected to the base, a vibrator 210, a vibrator fixing seat 220 and two layers of screens 230 are arranged in the screen barrel, the screen divides the inner cavity of the screen barrel into three screening cavities, the screen barrel is provided with three discharge ports 240 corresponding to the screening cavities, the top of the screen barrel is provided with a feed port 250, the bottom of the screen barrel is provided with an annular mounting seat 260 fixed relative to the screen barrel, an annular permanent magnet group 300 is fixed on the annular mounting seat, and the annular permanent magnet group consists of a circumferential It is composed of permanent magnet monomers 310 distributed in an array, and the magnetic pole axis of the permanent magnet monomer is tilted inward at the upper end, and the inclination angle is generally between 20° and 45°; a horizontal annular electromagnet group 400 coaxial with the annular permanent magnet group is provided on the base, and the annular electromagnet group is composed of electromagnetic monomers 410 distributed in a circular array and corresponding to the permanent magnet monomers one by one, and the magnetic pole axis of the electromagnetic monomer is coaxial with the magnetic pole axis of the permanent magnet monomer. The number of permanent magnet monomers and electromagnetic monomers is generally more than 8, and the more the better the effect; it also includes a rectifier and a current controller.

[0019] See Figure 3 The electromagnetic monomers are divided into positioning electromagnetic monomers 411 and supporting electromagnetic monomers 412. The number of positioning electromagnetic monomers is 3 to 5. The positioning electromagnetic monomers are evenly distributed in the electromagnetic monomers. The upper magnetic pole of the positioning electromagnetic monomer is opposite to the lower magnetic pole of the corresponding permanent magnetic monomer, and the upper magnetic pole of the supporting electromagnetic monomer is the same as the lower magnetic pole of the corresponding permanent magnetic monomer. The positioning electromagnetic monomer constrains the sieve barrel by suction to prevent the sieve barrel from rotating. The suction generated by the positioning electromagnetic monomer is much smaller than the repulsion generated by the supporting electromagnetic monomer.

[0020] See Figure 1 The base is provided with a plurality of limit hooks 110, which can limit the height of the screen bucket within a fixed range. If there is no limit hook, once the screen bucket is subjected to an upward external force, the screen bucket is easily separated from the base and dumped, which may cause damage to the equipment, so it is necessary to install a limit hook to limit the screen bucket.

[0021] See Figure 1 A rubber shock-absorbing layer 120 is also provided at the bottom of the base to further buffer the vibration from the base and reduce the impact on the ground.

[0022] Example 2: See Figure 4A vibrating screen for thermoplastic elastomer production includes a base 100, a screen barrel 200 elastically connected to the base, a vibrator 210, a vibrator fixing seat 220 and two layers of screens 230 are arranged in the screen barrel, the screens divide the inner cavity of the screen barrel into three screening cavities 280, the screen barrel is provided with three discharge ports 240 corresponding to the screening cavities, a feed port 250 is arranged on the top of the screen barrel, and an annular mounting seat 260 fixed relative to the screen barrel is arranged at the bottom of the screen barrel, an annular permanent magnet group 300 is fixed on the annular mounting seat, and the annular permanent magnet group consists of It is composed of permanent magnet monomers 310 distributed in a circular array, and the magnetic pole axis of the permanent magnet monomer is tilted inward at the upper end, and the inclination angle is generally between 20° and 45°; a horizontal annular electromagnet group 400 is provided on the base and is coaxial with the annular permanent magnet group. The annular electromagnet group is composed of electromagnetic monomers 410 distributed in a circular array and corresponding to the permanent magnet monomers one by one, and the magnetic pole axis of the electromagnetic monomer is coaxial with the magnetic pole axis of the permanent magnet monomer. The number of permanent magnet monomers and electromagnetic monomers is generally more than 8, and the more the better the effect; it also includes a rectifier and a current controller.

[0023] The upper pole of the electromagnetic monomer has the same magnetic property as the lower pole of the corresponding permanent magnet monomer; a vertically arranged plug-in seat 130 is provided on the base, and a downwardly arranged plug-in body 270 is provided at the bottom of the screen barrel, and the plug-in body and the plug-in seat are plugged up and down and cannot rotate relative to each other. In order to prevent the vibrating plug-in body from colliding with the plug-in seat and causing the vibration to be directly transmitted to the base, generally, at least one of the plug-in body and the plug-in seat is made of rubber.

[0024] There are several limit hooks on the base, which can limit the height of the screen bucket within a fixed range. If there is no limit hook, once the screen bucket is subjected to an upward external force, the screen bucket will easily detach from the base and tip over, which will cause damage to the equipment. Therefore, it is necessary to install a limit hook to limit the screen bucket.

[0025] There is also a rubber shock-absorbing layer at the bottom of the base to further cushion the vibration from the base and reduce the impact on the ground.

[0026] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the claims.

Claims

1. A vibrating screen for thermoplastic elastomer production, comprising a base, a screen barrel elastically connected to the base, a vibrator and a screen mesh arranged in the screen barrel, the screen mesh dividing the inner cavity of the screen barrel into a plurality of screening cavities, the screen barrel being provided with a plurality of discharge ports corresponding to and connected to the screening cavities one by one, and a feed port being arranged on the top of the screen barrel, characterized in that: An annular mounting seat fixed relative to the sieve barrel is provided at the bottom or outer area thereof, an annular mounting seat is fixed with an annular permanent magnet group, the annular permanent magnet group is composed of a plurality of permanent magnet monomers distributed in a circular array, the magnetic pole axis of the permanent magnet monomer is inclined inwardly at the upper end; an annular electromagnet group horizontally coaxial with the annular permanent magnet group is provided on the base, the annular electromagnet group is composed of a plurality of electromagnetic monomers distributed in a circular array and corresponding one-to-one with the permanent magnet monomers, the magnetic pole axis of the electromagnetic monomer is coaxial with the magnetic pole axis of the permanent magnet monomer.

2. The vibrating screen for thermoplastic elastomer production according to claim 1, characterized in that: The electromagnetic monomers are divided into positioning electromagnetic monomers and supporting electromagnetic monomers. The positioning electromagnetic monomers are evenly distributed in the electromagnetic monomers. The upper magnetic poles of the positioning electromagnetic monomers are magnetically opposite to the lower magnetic poles of the corresponding permanent magnetic monomers, and the upper magnetic poles of the supporting electromagnetic monomers are magnetically the same as the lower magnetic poles of the corresponding permanent magnetic monomers.

3. The vibrating screen for thermoplastic elastomer production according to claim 1, characterized in that: The upper magnetic pole of the electromagnetic monomer has the same magnetic property as the lower magnetic pole of the corresponding permanent magnetic monomer; a vertically arranged socket is provided on the base, and a downwardly arranged socket body is provided at the bottom of the screen barrel. The socket body is connected to the socket up and down and cannot rotate relative to each other.

4. The vibrating screen for thermoplastic elastomer production according to claim 2 or 3, characterized in that: A plurality of limit hooks are arranged on the base, and the limit hooks can limit the height of the screen barrel within a fixed range.

5. The vibrating screen for thermoplastic elastomer production according to claim 4, characterized in that: A rubber shock-absorbing layer is also provided at the bottom of the base.

6. The vibrating screen for thermoplastic elastomer production according to claim 1, characterized in that: Also included are a rectifier and a current controller.

Images